Lubricating and polishing pad for talking-machine records.



P. B. DELANY.

LUBRICATING AND POLISH ING PAD FOR TALKING MACHINE HEfiORDS. APPLICATION FILED MAR. 1. I913.

LM'LQMU Patented Nov. 20, 191?.

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Specification of Letters Patent.

anoos. Patented new, no, rat a non ran 2.1:

' Application filed March 1, 191a terialltatttttt.

. certain new and useful Improved Lubri- -chi'ne Records, of W ich-the following is a cating and Polishin Pad for Talking-Maspecification.

f'lhis invention comprises "a pad of peculiar construction and make up for treatment of talking machine records for the purpose of incidentally removing dust but primarily to polish or smooth and lubricate the surface of the record and lubricate the needlewhich traverses it.

Figure 1 is an elementary form of this device that experience has demonstrated to be highly eflicient; and

Fig. 2, shows a modification.

The device comprises a pad of appropriate soft material adapted to be superficially coated or impregnated with graphite. -The pad shown in the drawing may be'a piece of felt, plush, corduroy, fabric 1 of good quality.

Applied to it is a coating 2 of-graphite which is well rubbed intothe surface and fibers of the pad and more or less impregfustian or other nates it. Experience has shown that a pad of this character has such aneifect upon the surfaces of the record as to materially improve the uality of the tones and utterances repro need from the record. The pad is backed b a harder though flexible ma.

shape and afl'ords a clean and flexible foundation u on which the fingers press when the pad 1s used. The flem'bility of the pad and its back or mounting is an important feature as it insures intimate oontact'between the pad and the grooves and interof the record notattainable with a rigidly mounted pad.

- ][n of a coating ofgraphite not mean t atthere is to be upon the d J l distinctive layer Of g'raphitebut what" I do mean is that the graphite appears upon the surface as a discoloratiomthat is to say, 1

Vtheinfinitelyfineparticles of graphite ad.- ghere-tothefibers or threads, if such there fbg 'ufilvsuperficiallyq Such application off ,graphite 'to'the surface of the ad' may a made by rubbing upon it fine y flaked or, -5'

powdered graphlte or by rubbing the 8/ lai'jtondl i most thoroughly done by revolvinga stick 'of graphite a lathe or other revolving holder and enveloping it with the pad while held in the hand and turning the pad a quarter way at a time for separate treatinent until the graphite has been rubbed into it in four directions thus insuring thorough coating or impregnation of the threads of the fabric on all sides to their woof or weave foundation. ln this way the particles of graphite adhering tothe fabric are infinitely smaller than any possible application from the powdered graphite.

,(lhe graphite which is applied to a record, ru bed with a pad prepared as described, is in impalpable condition, and the quantity adhering to the record is exceedingly small. Tests have demonstrated the factthat the surface of the record is finely polished and that although the graphite is practically imperceptible, not rubbing off when the record is handled, it afi'ords a fine lubricant for the needle, insurin perfect reproductions of the sounds reoor ed.

Another and highly important feature of my invention, shown. in Fig. 2, consists of providing a storage supply of the polishing or lubricating material suficient for a long time and which is gradually supplied to the surface of the pad automatically by the the proper performance, of this invention the powdered graphite is in no way wil through the pad but it is forcedthrough the felt by compression and relaxation'and: the particles of the graphite, in p r a n 1 through the pad, rub against innpmerable h are fine finpalpable condition in substantia the same way that the outside fibers become coated by frictional contact therewith of graphite, as previously described." A

reduced b v .the analogous 'rubbin y p operaf f ,1. 1.. on paper with a". he i hers and y f abrasion rubbed to an exceedingly pencil.

of graphite is found on paper tic with a dry lubricant in the form of an impalpablepowder derived abrasion of is placed between the central portions of the feltish pad' 1 and its back 3, their edges for about half an .inch being" cemented to i 5. gether so that there can be no escape of the material laterally. This constant and automatic impregnation of the pad with the filtered or screened substance should 'afiord thev and purest supply of. polishing and lubricating material and; to a degree cloisellycoinmensurate'withthe requirements.

1 .1; A pad for mammal. of mung machine records, comprising a offeltlike material coated-on its po side 4 in a'powdered state a solid stick of lubricating material, such as graphite the pad;

2. A pad chine records comprising a piece of fe t having its fibers coatedon its polishing side or treatment of .talkmF .ma- 2) with a dry lubricant in the form of an impal able wderzderived from abrasion ,Wit a so id block or stick of lubricating material andan impervious back piece connected to the felt. In, ony subscribed my name V PATRICK B. DELANY.

whereof, I have hereunto I 

